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Sewage water treatment with energy recovery using constructed wetlands integrated with a bioelectrochemical system

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Abstract

In the present study, we investigated the role of constructed wetlands (CWs) integrated with a bioelectrochemical system (BES), which can concurrently treat wastewater effectively with energy recovery. This CW integrated system utilizes NH4+–N (96.66%), NO3–N (83.09%), PO43−–P (91.04%) and SO42− (83.98%) to enable effective pollutant removal from sewage wastewater. Nitrite accumulation was not observed in the systems with applied voltage >15 mV and MFCs–ME. The ME-30-CWs system favours the removals of all pollutants, except ammonia. The average power density and current density of 1.723 mW m−2 and 5.423 mA m−2 were recorded in MFC–CWs during wastewater treatment. Bacteria causing waterborne diseases such as Shigella sp. and Salmonella sp. were significantly eliminated in the CW integrated system. The promising potential of CWs and bioelectrochemical technology can be an effective alternative to the water–energy nexus for waste stream applications.

Graphical abstract: Sewage water treatment with energy recovery using constructed wetlands integrated with a bioelectrochemical system

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Article information


Submitted
29 Sep 2019
Accepted
13 Jan 2020
First published
15 Jan 2020

Environ. Sci.: Water Res. Technol., 2020, Advance Article
Article type
Paper

Sewage water treatment with energy recovery using constructed wetlands integrated with a bioelectrochemical system

M. Kumar and R. Singh, Environ. Sci.: Water Res. Technol., 2020, Advance Article , DOI: 10.1039/C9EW00867E

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